Share 'Error: cURL error: Operation timed out'

Hi guys,
I am getting the following error:Error: cURL error: Operation timed out after 10000 milliseconds with 0 bytes received
All was working well previously and I have not changed anything on my network.
What would cause this error?
This is from a simple test as detailed below:
require_once('ning-api-php/NingApi.php');
echo "Fetch Recent Photos..";// Get the most recent phototry { $result =…